Shell-Type Transformers refer to a specific design of electrical transformers where the core surrounds or encases the windings. In contrast to the more common “core-type” transformers, where the windings surround the core, shell-type transformers have a core that forms a shell around the windings. This design has a few key characteristics:

Features of Shell-Type Transformers:

  1. Core Configuration: The core in a shell-type transformer is typically made up of multiple limbs or legs. The windings are placed around the central limb, and the outer limbs form a protective shell around the windings.
  2. Magnetic Circuit: The magnetic circuit in shell-type transformers is usually more complex than in core-type transformers. The magnetic flux divides and flows through multiple paths, which can result in better magnetic coupling and reduced leakage flux.
  3. Mechanical Strength: The shell-type construction provides higher mechanical strength and better protection against external forces. This makes shell-type transformers more robust and durable.
  4. Reduced Leakage Reactance: Due to the way the core encases the windings, shell-type transformers often have lower leakage reactance, which can improve voltage regulation.
  5. Usage: Shell-type transformers are commonly used in applications where high efficiency and good voltage regulation are important. They are often found in power distribution, electrical substations, and other critical infrastructure